Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

The resistance of a discharge tube is

Options:

Ohmic

Non-ohmic

Zero

Infinite

Correct Answer:

Non-ohmic

Explanation:

When the discharge tube is turned off, it has a very high resistance and when it is turned on, it has a very low resistance. V and I do not have a linear relationship. That is why it is referred to as non-ohmic.